Wool chrome dyestuff



'acid, 23.0 parts 2-m-aminobenzyloxyethanol, 21.2 We claim:

Patented Jan. 30, 1951 7 1 UNITED STATES PATENT OFFICE WOOL CHROME DYESTUFF David I. Randall, Easton, 3a., and Edgar E. Renfrew, Phillipsburg, N. 3., assignors to General Aniline *3:v Film Corporation, New York, N. Y., a co'rporation of Delaware No Drawing. Application December 10, 1949,

Serial No. 132,392

2 Claims. (Cl. 260--373) This invention relates to a new and valuable ride, 0.5 part finely divided copper and 980.0 parts dyestuff of the anthraquinone series which yields water. The mixture was maintained at 60-7 C.

attractive blue-green shades upon after-chromfor thirty hours, during which time it was stirred. ing on 1. The mixture was diluted to double its original The dyestufi of the present invention has the 5 volume, warmed to 80 C., and filtered. To the following formula: hot filtrate was added 200 parts sodium chloride;

Hoomomoo a SO3H H038 omoomomon It is formed from the reaction of 4,8-dibromoon cooling, a Solid deposited which was removed anthrarufin-2,6-disulfonic acid with 2-m-aminobenzyloxyethanol. It yields upon after-chroming on wool attractive blue-green shades which by filtration. This cake was reprecipitated twice more from approximately 10% brine and once from 5% brine. After the final filtration the if fiiffigfi fiz i g g ig and fuumg and cake was washed with 2% salt solution and dried. The following example illustrates preferred It Welghed 31 parts Dyemgs of thls product on embodiments of the invention but it Will be underyielded an attractive blue green shade fi stood that variations and modifications may be chromtng of Y good fastness 9 mumgma within the scope of the claims Chrommg was in the usual manner using potassium bichromate. The reaction may be repre- Em p sented as follows:

S 0 all 2NHz- CHzO CHzCHzOH SOxH H Br

H0 8 CHnO CHQCHQOH parts sodium carbonate, 1.5 parts cuprous chlo- 1. A new dyestufi of the formula:

p OH HOCHZCHEOC 2 303B HOaS /CH2O CHaCHaOH "2'. A method for preparing a new dyestufl of the formula:

Hons I cmo CHzOHzOH which comprises reacting 4,8v-dibr omoa nthraru fin-2,6-disu1fonic acid with z-m-aminobenzyloxyethanol.

' DAVID I. RANDALL.

EDGAR E. RENFREW.

No references cited. 

1. A NEW DYESTUFF OF THE FORMULA: 